Segmented current-steering digital-to-analog converter
A technology of segmented current, digital-to-analog conversion circuit, applied in the field of microelectronics, can solve the problem that the synchronous latch has a small adjustable range of cross-points, the signal-to-noise ratio of digital-to-analog converters, and the dynamic range of noise-free dynamic characteristics. , large area and power consumption, etc., to achieve the effect of improving signal-to-noise ratio and clutter-free dynamic range, reducing clock feedthrough effects and glitches, and reducing area and power consumption
A technology of segmented current, digital-to-analog conversion circuit, applied in the field of microelectronics, can solve the problem that the synchronous latch has a small adjustable range of cross-points, the signal-to-noise ratio of digital-to-analog converters, and the dynamic range of noise-free dynamic characteristics. , large area and power consumption, etc., to achieve the effect of improving signal-to-noise ratio and clutter-free dynamic range, reducing clock feedthrough effects and glitches, and reducing area and power consumption
CN101741389AInactive Publication Date: 2010-06-16XIDIAN UNIV
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[0031] refer to figure 2 , The segmented current steering digital-to-analog conversion circuit of the present invention includes: a reference voltage generating circuit, a reference voltage-to-reference current conversion circuit, an encoding circuit, a current source matrix, a switch drive circuit array, a switch array and a two-stage clock delay circuit. The encoding circuit adopts a two-stage pipeline encoding structure, and the switch driving circuit array is connected between the two-stage pipeline encoding circuit and the switch array; the switch array is connected with the current source matrix, and the output current of the current source is controlled to flow to the output port IA or IB; the current source The matrix, the current switch array and the coding circuit adopt the "5+4+5" segment structure, that is, the upper 5 bits and the middle 4 bits adopt the temperature code structure, and the lower 5 bits adopt the binary code structure; between the clock input signa...
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The invention discloses a high-speed high-accuracy digital-to-analog conversion circuit. The circuit comprises a reference voltage generation circuit, a reference voltage-to-reference current conversion circuit, a coding circuit, a current source matrix and a switch array, wherein the coding circuit has a two-stage water-flowing type coding structure, a switch driving circuit array is connected between the two-stage water-flowing type coding circuit and the switch array, and a two-stage clock delay circuit is connected between a clock input signal and the two-stage coding circuit and provides a clock signal to the two-stage water-flowing type coding circuit; and the current source matrix, a current switch and the coding circuit have a '5+4+5' segmental structure, namely high 5 bits and middle 4 bits have a thermometer code structure, and low 5 bits have a binary code structure. The high-speed high-accuracy digital-to-analog conversion circuit effectively reduces the area and the power consumption of chips, reduces the complexity of the coding circuit, increases conversion rate, reduces burrs, and improves the dynamic characteristics of a digital-to-analog converter. The high-speed high-accuracy digital-to-analog conversion circuit is used for digital processing systems, audio / video conversion systems and communication systems.
Description
technical field [0001] The invention belongs to the field of microelectronics, in particular to a segmented current steering digital-to-analog converter for communication and high-speed signal processing systems. Background technique [0002] A digital-to-analog converter (DAC) is considered as one of the general-purpose mixed-signal integrated circuits and has a wide range of applications in digital systems. The rapid development of digital processing technology has put forward higher requirements for digital-to-analog converters. For example, higher speed, higher precision, lower power consumption and operating voltage and so on. Digital-to-analog converters (DACs) are widely used in communication systems and audio and video processing systems. With the compatibility of integrated circuits and manufacturing processes, high-speed and high-precision digital-to-analog converters have become a hot spot in the research of analog integrated circuits. Because of its high speed...
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Patent Timeline
16 Jun 2010
Publication
CN101741389A
- IPC
- H03M1/66
- Inventors
- 朱樟明; 高翔